Most common organism involved in periapicl granuloma

Most common organism involved in periapicl granuloma /
Anaerobic
Mixed
Aerobic
Sterile n no microorg

Of the 16 periapical granulomas studied, 14 (88%) yielded a positive growth when homogenized and cultured. The concentration of colony-forming units per milliliter of the suspension ranged from 101.3 to 104.0 (mean 102.2). A total of 47 isolates comprising 26 (55%) facultative anaerobes and 21 (45%) strict anaerobes were obtained. The organisms most commonly cultured wereVeillonella species (15%)Streptococcus milleri (11%),Streptococcus sanguis (11%),Actinomyces naeslundii (11%),Propionibacterium acnes (11%), andBacteroides species (10%). Most of the organisms (96%) were sensitive to either amoxicillin, clindamycin, or tetracycline, whereas only 45% were sensitive to metronidazole.